Alarm device



H.. HEYNE hLARM DEVICE Filed g, 20, 1924 Patented Mar. 3, 1925.

UNITED? PATENT LOLFFHIE:

HANS HEYNE, or 'DRESDEN-BLASEWITZ, GERMANY.

ALARM nEvIoE.

Application filed August20, 1924. Serial No. 733,150.

exact description-of the invention, such as I will-enable otherskilled in theart to which it apperta-ins 'to-make and use the same. Thisinventionrelates to improvements in alarm devices,especially advantageous for use upon motor driven vehicles, having for an objectzto provide an electrical alarm unafieotibl-eby climatic or atmospheric condi tions,: which, when installed I upon 'a motor driven vehicle 'will'If-u-nc'tion to 1 give imme-; 1 I

l er and t0 r rt onaof a x i i h eby f0 n rma lye x rt a P1 to 0P" era tingilever Z" in order that theopposed 1' am oi the, cl mpinsa m n and 0 W111 T l in constant engagement-with theoppositediate alarm withj-thetransmis'sion of but'the slightestvibration thereto, as for example,

the steppingiof :a-pIerson' onto the vehicle running :board or into; thevehicle, the rais ing of the mot or hood, the cutting of electricalwiresgoriofichains, an attempt to remove accessories, et;c 'etera.

It'is likewise an; object of the invention to provide an alarm of the charactermentioned employing means; forfadjusting the circuit closingfmeans -thereofto such a nicety asto regulate the "sensitivity of-the alarm to vibrations, in'order that the 'period of operation of such alarm may be predetermined.

Other objects of the invention will be in part obvious, and in part pointedouthereinafter;

In order that the inventionitsjmbde of-operation-may be readily understood-by person's skilled in the art, I havejin ,theaccompanying illustrative drawings, in the detailed following description based thereupon, set out one possible embodiment of the same.

In-thesedrawings:

Figure l is fa fragmentary vertical longitudinal section through the improved alarm;

F igure2 is a vertical-transverse section through the same; and,

Figure 3 is a vertical longitudinal section throughzthetubevof the circuit closing devicepro pen .v 2

Havingmoreparticular reference to the drawings, in connection with which like characters ofreference will designate corresponding parts throughout, the improved alarm device may be stated to comprise a casing A constructed of suitable material and supported at its upper end upon the right angularfree extremity of asupporting+ arm A, said upperportion-of the casing; having a hanger bracket A securedtothef same, as shown in theFigure 1 andadapte'd to have pivotal bearing upon theouterpofr' tion of the arm A', as shown in the drawings; segmental bar Sis secured-to the lower side or the casing A and is disposed longitudi'nallyj, of the same; 'the oppositesides 015 said e sins pte be engag byhe? t e ow r ex r ities Q -Wh Q are s o t ;and connected bytogglejoint toan operat k ng ev r Z, w i llqa w ll'b no y p d te eri t d to: a'su abl ifix P as Heat d t r; a eq tr w coiled pr n being connected tothejouterportion. of said sides of the' 'segiinental arm 3. y In this way, I

it will be understood 'that the casingsA- will ed positionwith respect to an automobile'or other device equipped therewith; the clamp v mg arms n'and 0 when engaged with the;

opposite sides of the: segmental arm S serving to prevent any possible swinging move-V ment of such casing.

A bracket arm 6" is fixedly secured-within the casing A, as shown in the Figure 1, and

has a supporting arm 6 hinged thereto, as indicated at 0; the outer end ofsuch'sup;

porting arm being adapted to be engaged by aknob passed through a segmental slot or wayfiw formed in the adjacent side of said casing A into engagement with the free end of the. .hinged supporting arm I). In this way, it '.will be understood that pivotal movement may be imparted to the arm 6 by mov ing the knob f upwardly and downwardly through the slot w. 7

Supported upon the upper side of-the arm 6 is an evacuated glass tube ahaving'pock ets h and 4' formed in the lower =portion-of the same as is clearly shown in the Figure 3,

while electrical conductors in and Z are'fmold ed in the glass of thebottom portions-of these pockets and are extended into" the tube a as shown.- A quantity of mercury-or simi'-' lar electrically conductive material is arranged within the tubec and is adapted to be normally divided into several bodies 'llldicated herein-for the purpose of conven ience by the reference characters It and 2", the smaller body 2" being normally arranged in the pocket 2'. Metal straps or similar securing devices are preferably passed about the opposite end portions of the tube a of the circuit closing device proper and are anchored to adjacent portions of the arm Z). Thus, displacement or undue movement of the tube a will be absolutely prevented. The electrical conductors 7c and Z, as will be noted, are extended from the casing A of the alarm device into engagement with an audible signalling device, not shown.

With a view towards providing means for securing the hinged arm I) in an adjusted position whereby the bodies of mercury 71/ and 2" within the evacuated tube a will be properly relatively positioned, a graduated dial 6 is mounted adjacent one side of the casing A upon a stub shaft 6 rotatably mounted in suitable bearings in an adjacent portion of said casing side; the inner end of the shaft carrying an eccentrically mounted disc d thereupon, the peripheral portion of which is so arranged as to engage with a portion of the under side of the hinged arm 1). Thus, it will be understood that with rotation of the dial 6, the eccentrically mounted disc at will be rotated, and in consequence, the desired pivotal adjustment of the hinged arm 6 carrying the circuit closing device of the alarm will be effected, thereby causing the desired spacing of the several bodies of mercury h and i in said tube a.

To cushion downward movement of the arm 6 with release of the knob f whereby displacement of the mercury bodies It and i will be prevented, a dash pot g is positioned within the casing A and has the piston 32 thereof connected through a link 29 to the free end portion of the arm Z2. Thus, with release of the knob f subsequently to the raising of the same within the slot 10, it will be understood that return of the same to a position whereat it will engage with the previously adjusted peripheral portion of the disc 0? will be gradual and therefore, will prevent any possibility of displacement of the mercury bodies It and i to such an extent as to cause the same to merge one into another.

The modus operandi of the invention may be stated to be as follows:

Assuming that the device has been attached to a portion of a motor driven vehicle and that the casing A has been properly adjusted and secured in a fixed position through the medium of the clamping arms 'n and 0 operated by the lever Z, the several mercury bodies It and z" are properly adj usted within the tube a, the smaller body 2" being received in the pocket 2' and being spaced for a short distance from the larger body it, as is clearly shown in the Figure 3. To effect proper placement of the bodies it masses tated. Upon effecting proper adjustment of the dial 6 and the disc 03, the knob f is released, whereupon the arm will slowly re turn to its lower position, engaging the pe ripheral portion of the adjusted eccentric disc d without further ado, as by manual ad justment or similar tedious details of operation. Abrupt downward movement of the arm bwill be prevented by reason of the engagement of the piston p within the cylinder of the dash pot g, it being understood that such piston p is connected by a coupling link 19 to the free portion of said arm 6. The circuit closing device of the alarm is now properly set for vibrations of predetermined intensity. Thus, it will be understood that with the transmission of vibrations of sufficient intensity to the casing A of the alarm device, the several spaced mercury bodies It and 2'' Within the tube a will be displaced, thus causing the same to merge one into the other and in consequence, closing an electrical circuit through the electrical conductors 7c and Z and thereby eflecting operation of the audible signal connected to such conductors, hence, giving warning of an attempted theft of the vehicle or of parts or accessories of the same. In this connection, it of course will be understood that the vibration transmitted to the casing A may come from different causes, as for example, the stepping of a person onto the running board of the vehicle or into the vehicle, the raising of the motor hood, cutting of wires or rods or looking devices of the vehicle, an attempted removal of tires from the vehicle or from the spare tire rack or racks of the vehicle or any other attempted theft of accessories of such vehicle.

Manifestly, the construction shown is capable of considerable modification, and such modification as is within the scope of my claims, I consider within the spirit of my invention.

1. An electrical alarm device of the char acter described comprising a casing, an arm hingedly supported within said casing, means extended from said arm without the casing whereby to facilitate pivotal movement of the same, an evacuated glass tube supported on said arm containing a quantity of mercury, said quantity of mercury being adaptedto be normally divided into several spaced bodies, electrical conductors extended into the tube and engaging the several spaced bodies, a dial rotat-ably mounted adjacent one side Wall of the caslng, and an eccentrically mounted disc connected to said dial and having the peripheral portion thereof disposed whereby to engage and support said hinged arm.

2. An alarm device of the character described comprising a casing, a movably supported tube therein containing a quantity of mercury adapted to be normally divided into several spaced bodies, a rotatable dial mounted adjacent one side of the casing, a disc connected to said dial and arranged Within the casing having its peripheral portion disposed to engage and adjustably sup port the said tube, and electrical conductors extending into the tube and engaging the several bodies of mercury therein.

In Witness whereof I have hereunto set my hand.

HANS HEYNE. 

